he was campaigning in the state of north carolina today and he said this about governor romney's tax plan. >> how they can justify, how they can justify raising taxes in the middle class that's been buried the last four years. >> bill: did you catch that? the middle class that's been buried over the past four years. the vice president also saying that former president george w. bush is the one to blame, but a romney campaign spokeswoman says, quote, under president obama, the middle class has suffered from crushing unemployment, rising prices and falling incomes. they can't afford to be buried for four more years. and the republican vp nominee, paul ryan, weighed in during a rally on this same topic late today in iowa. >> vice president biden just today said that the middle class over the last four years has been, quote, buried. we agree. that means we need romney in denver, colorado. before we get to carl, we want to go to ed henry live with the president in las vegas tonight's. how is the prep going for the big deal tomorrow night? good evening. >> it's been hours of debate prep. i